{"id":"MGASA-2026-0349","summary":"Updated python-hpack packages fix a security vulnerability","details":"An issue was found in the python-hyper/hpack library, most commonly used as\na downstream dependency of the python-hyper/h2 library (an HTTP/2 client\nand server implementation). Unbounded variable integer decoding can\ncause run-away computation on malformed input leading to O(n^2) runtime,\neffectively blocking further processing with large enough unsanitized\ninput.\nA fix python-hyper/hpack v4.2.0 restricts variable integer decoding to\nuint32 to prevent run-away computation.\n","modified":"2026-09-01T03:15:03.616845841Z","published":"2026-08-31T19:40:26Z","upstream":["CVE-2026-59980"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2026-0349.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=36197"},{"type":"ADVISORY","url":"https://github.com/python-hyper/hpack/security/advisories/GHSA-8v8h-hg4w-mvq2"}],"affected":[{"package":{"name":"python-hpack","ecosystem":"Mageia:10","purl":"pkg:rpm/mageia/python-hpack?arch=source&distro=mageia-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0-1.mga10"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0349.json"}}],"schema_version":"1.9.0","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}